If you've noticed a significant difference in the performance of your synthetic surface due to a faster or slower ball roll it could be due to a number of factors. Excessive or inadequate infill may well be the first issue. Too much or too little sand / rubber can significantly affect the performance of your synthetic surface. You should refer to your installer for the exact infill requirements, or arrange for Technical Surfaces to assess your facility free of charge. Another factor may be a general deterioration of the surface over time and a hardening of the infill. This will lead to a faster ball roll and higher bounce. If you are experiencing this you should contact us immediately to assess your surface.